What does it mean when it says Exhaust Fluid Quality Poor?
A dealer may encounter a customer concern of an Exhaust Fluid Quality Poor message displayed on the DIC. The dealer may or may not find DTCs stored. The Exhaust Fluid Quality Poor DIC message notifies the customer that the ECM has detected a drop in the SCR NOx reduction efficiency.
How do I know if my diesel exhaust fluid is bad?
The easiest way to spot bad DEF is to look at it. The fluid is naturally clear so if it appears cloudy or colored, it’s likely contaminated or old. Contaminates, including small particles or larger rocks or dirt will also be easy to see. If DEF has gone bad, do not attempt to use it.
What does DEF quality poor mean?
In short, this message means that the NOx emissions measured at the outlet NOx sensor are higher than the computer expects for a given situation.
Can def fluid explode?
Mixed with certain oxidants, chlorides, nitrites can cause fire or even explosions.
How do you reset poor DEF quality?
A system tamper service bay test might clear it. Do a manual regeneration clean it up. Then it has to pass a DEF fluid quality test. If you can keep driving it, the ECM will run the tests and either clear the message or turn the light back on.
Why do diesel engines need DEF?
DEF, also known as AdBlue or Blue DEF, is an elixir that’s necessary to make sure that what exits a diesel vehicle’s tailpipe is as sweet as an Alpine breeze. Those two compounds then react with oxygen and detrimental nitrogen oxides inside the vehicle’s selective catalytic reduction (SCR) catalyst.
Is there such thing as bad DEF?
1 : something that is bad There’s more good than bad in him. Take the good with the bad. 2 : an evil or unhappy state Things went from bad to worse.
Where is DEF quality sensor located?
DEF tank
A DEF quality sensor is mounted on the side of the DEF tank. This sensor detects the Urea concentration in the DEF to confirm it is acceptable for effective dosing (approximately 32.5% Urea).
What does low DEF Diesel Exhaust Fluid mean?
So Friday I had the “Diesel Exhaust Fluid Quality Poor Message” pop up on the dash with a 100 mile warning. I restarted the truck with no warning. I drove about 25 miles and the “Low DEF” message came on.
How to diagnose exhaust fluid quality poor message?
If the dealer has found an Exhaust Fluid Quality Poor message with no DTCs, diagnose the condition using the current SI diagnosis for DTC P20EE. After making repairs use the SI Document titled “Reductant Fluid Quality Test (With or without DTCs)” to evaluate and clear the Exhaust Fluid Quality Poor DIC message.
What does Pip mean for diesel exhaust fluid?
This PI is to assist with vehicles that have difficulty completing the DEF (diesel exhaust fluid) quality test and/or clearing the Exhaust Fluid Quality Poor Message. Complete the current SI diagnostic for any trouble codes or symptoms found.
Is there a Def issue with Duramax exhaust fluid?
Failed again, not codes came back, temp sensors OK. Noticed on deaccell nox sensor 1 not dropping below 5ppm, staying above 24ppm. Nox sensor slow to respond install latest software and install nox sensor 1 and perform qualtiy test and passed. First DEF issue I have ever had and hopefully it will be a long time before another.